Agathidium rubellum Fall, 1934b: 105

MILLER, KELLY B. & WHEELER, QUENTIN D., 2005, Slime-Mold Beetles Of The Genus Agathidium Panzer In North And Central America, Part Ii. Coleoptera: Leiodidae, Bulletin of the American Museum of Natural History 2005 (291), pp. 1-167 : 154-161

Agathidium rubellum Fall, 1934b: 105 .

TYPE MATERIAL: Lectotype (designated here to clarify assignment of this name to this species), Ƌ in MCZC labeled ‘‘ TYPE rubellum [name handwritten, red line under ‘‘TYPE’’]/ M.C.Z. Type 24043/H.C. FALL COLLECTION.’’ There are also four paralectotypes from North Carolina. Fall indicat­ ed he had five specimens, but he did not formally designate a holotype. Therefore , we have selected a male specimen bearing a type label and number as the lectotype for this species.

TYPE LOCALITY: United States, North Carolina.

DIAGNOSIS: The shape of the median lobe is distinctive in this species with the apical portion long, directed at an angle dorsad, slightly expanded medially along dorsal margin in lateral aspect, and with the operculum narrow and long with the apex slightly laterally expanded (fig. 348). The male metafemoral tooth is small (fig. 170) and the metasternal fovea is minute. The sutural stria extends about one­fifth to one­third the length of the elytron. This species is extremely similar to A. oniscoides from which it can be distinguished by smaller size, red coloration, and smaller metasternal fovea (see ‘‘Discussion’’ under A. oniscoides ). The species is also very similar to A. exiguum and A. fawcettae , from which it may be distinguished by the (generally) shorter sutural stria, shape of median lobe, minute metasternal fovea, and nearly glabrous metasternum.

DESCRIPTION: Body small (TBL = 2.29– 2.84 mm), oblong (PNW/TBL = 0.45–0.51), strongly contractile.

Head, pronotum, and elytra red; venter yellow to yellow­red; antennae, palpi, and legs yellow.

Head broad (MDL/OHW = 0.56–0.67), dorsal surface flattened, dorsoventrally compressed; with very fine punctures, each with a short, very fine seta, surface between punctures shiny, with fine microreticulation; frontoclypeal suture obsolete medially; gula without tubercle; eyes rounded, not compressed, prominent, small­faceted; gula slightly concave; antennomere ratios: length I:II:III = 2.0:1.0:2.2, width VII:VIII:IX = 1.0:1.0:2.1. Pronotum very large, broad (PNL/PNW = 0.64–0.78), strongly convex, anterolateral lobes strongly produced, lateral margin broadly curved, not angulate; with very fine, sparse punctures, each with a short, very fine seta, surface between punctures shiny, with fine microreticulation. Elytra broad, slightly elongated, lateral margins strongly rounded, apically rounded (SEL/ ELW = 0.89–1.06); punctation similar to pronotum; sutural stria extending from apex about one­third length of elytron. Flight wings fully developed. Mesosternum broad, broadly convex; medial carina well developed. Metasternum relatively narrow (MTL/ MTW = 0.15–0.20), medially flat, gently sloped anteriorly, without posterior flange; oblique femoral carinae obscured, low, not prominent.

Male tarsi 5­5­4; pro­ and mesobasotarsomeres slightly laterally expanded, with small ventral field of spatulate setae; mandibles not modified; metafemur broad, with small subapical tooth on posterior margin (fig. 170); metasternal fovea very small to minute, medial, with small pencil of long, fine setae. Median lobe in lateral aspect long, slender, evenly curved basally, apical portion short, very slender, straight, directed at angle dorsally, slightly expanded medially, apex pointed (fig. 349); in ventral aspect very slender, lateral margins parallel, apical por­ tion tapered to broadly rounded, slightly laterally expanded apex (fig. 348); operculum long, nearly attaining apex of median lobe, evenly tapered in ventral aspect, subapically abruptly expanded laterally, apex rounded (fig. 348); lateral lobes long, slender, evenly curved basally, apically slightly sinuate, apex narrowly rounded with 2 stout setae. (fig. 349).

Female tarsi 5­4­4.

DISTRIBUTION: This species is widespread in eastern North America (fig. 378).

SPECIMENS EXAMINED: CANADA: Nova Scotia: Cape Breton HNP, Cheticamp River Trail, 22 Sep 1984, on ‘‘mushrooms’’, JM Campbell, Davies (1, CNCI).

UNITED STATES: Alabama: Monroe Co.: Big Flat Creek 31°36̍30̎N, 87° 24̍53̎W, 27 May 1995, riparian, CE Carlton (1, LSAM). Arkansas: Washington Co.: 3 mi S Devils Den St Park, 28 May 1979, oak­hickory, S and J Peck (1, CNCI). Illinois: Savanna Co.: Miss. Palisades Park, 13 May 1979, oak woods, malaise FIT, S and J Peck (1, CNCI). Kentucky: Jackson Co.: The Rises St Park Sta. Camp Creek, 16 Nov 1967, Berlese, T Marsh, W Andrews (1, CNCI). Massachusetts: Northboro, Sep 1935, rotten logs, Frost (1, MCZC). Missouri: state only (1, MCZC). Nebraska: Lincoln, 7 Sep 1974, EJ Kitchey (1, CNCI). New Hampshire: Rumney, 27 Jun 1926, sweeping Alnus , Darlington (1, MCZC); Coos Co.: Mt Jeffers. Notch Road, 15 Sep 1987, 2200̍, A Smetana (1, CNCI); Straf. Co.: Spruce Hole, 2 mi SW Durham, 12 Jun 1982, beech litter, DS Chandler (1, DENH); Spruce Hole 3 mi SW Durham, 27 May 1987, DS Chandler (1, CNCI). New York: Mosholu, Nov, Angell (2, CNCI); Tompkins Co.: 7 mi E Ithaca, Ringwood Forest, 8 Jun 1968, rotted stump litter, Berlese, S Peck (1, CNCI). North Carolina: state only (4, MCZC); Black Mtn (1, AMNH); Alleghany Co.: Roaring Gap, Stone Mt St Park Rd, 18 Aug 1981, 2000̍, leaf litter, S Peck (1, CNCI); Cumberland Knob, Blue Ridge Parkway mi 218, 19 Aug 1981, 2700̍, forest leaf litter, S Peck (1, PECK); Avery Co.: Linville Falls, Blue Ridge Park mi 317, 2 Jun 1981, 3500, FIT, S Peck (2, PECK); Grandfather Mtn, Blue Ridge Parkway mi 304, 17 Aug 1981, 4000̍, leaf litter, S Peck (2, CNCI); Durham Co.: Durham, May 1973, blacklight, S Hughes­Schrader (1, FGAC); Macon Co.: Conee Bald, 9 Jun 1981, stump, QD Wheeler (1, QDWC); Highlands, 12 Sep 1981, QD Wheeler (2, QDWC); Highlands, 8 Jun 1981, QD Wheeler (5, QDWC); 4 mi N Franklin, 18 Mar 1976, rotten stump, QD Wheeler (2, QDWC); Wilkes Co.: Jeffres Park, Blue Ridge Parkway, 1 Jun 1981, 3500̍, FIT, S Peck (1, CNCI). Pennsylvania: Clycoming Co.: S Williamsport, 18 Sep 1969, W Muchmore (1, CNCI); McKean Co.: Allegheny Natl For. Tionesta Scenic, 10 Aug 1984, forest litter, DS Chandler (1, CNCI); West Co.: 3 mi E Berlin, 10 Jul 1984, rotten wood, DS Chandler (1, CNCI); West. Co.: Linn Run St. Park, Linn Run, 12 Jul 1984, 2260̍, rotten log, DS Chandler (1, CNCI); Linn Run St. Park, Linn Run, 10 Jul 1984, 2100̍, leaf and bark litter, DS Chandler (1, CNCI); Westmoreland Co.: Chestnut Ridge, 9 Jun 1971, Rhododendron litter, WR Suter (1, FMNH). South Carolina: Oconee Co.: Oconee St Park, 21 Jun 1967, 1000̍, Berlese, S Peck, Fiske (1, PECK). Virginia: Tazewell­ Bland Co.: 4.4 mi S Burkes Garden, 30 Jun 1968, log litter, S Peck (1, CNCI). West Virginia: Monongalia Co.: Coopers Rock St. Forest, 6 Aug 1986, 2100̍, on Tuberifera ferruginosa, SL Stephenson (1, AMNH); Pendleton Co.: Spruce Knob, 8 Jun 1975, 3500̍, litter, Berlese, Peck, Fiske (1, PECK).

DISCUSSION: This species is very similar to A. oniscoides . See the discussion under that species for comments on the status of these two species.

This species occurs in eastern hardwood forests where numerous specimens have been extracted from leaf and log litter. Elevation records are from 1000 to 4000 ft. Host records are from Tuberifera ferruginosa and ‘‘mushrooms’’.

Agathidium exiguum Melsheimer Figures 171 , 351–353 , 379

Agathidium exiguum Melsheimer, 1844: 103 ; LeConte, 1853; Horn, 1880; Matthews, 1887; Leng, 1920; Fall, 1934b.

Agathidium minutum: Attributed to Melsheimer, MS, by Melsheimer (1844). (Published in synonymy with A. exiguum and never made available by subsequent use as a valid name.) NOMEN NUDUM.

Agathidium ruficorne LeConte, 1850: 222 ; 1853 (synonymy with A. exiguum ); Leng, 1920.

Agathidium californicum Horn, 1880: 303 ; Matthews, 1887; Leng, 1920; Fall, 1934b; Hatch, 1957. NEW SYNONYM.

Agathidium alutaceum Fall, 1934b: 107 . NEW SYN­ ONYM.

TYPE MATERIAL: Agathidium exiguum : lectotype (designated here to clarify association of this name with this species), Ƌ in MCZC labeled ‘‘[circular blue disc]/Type 3188 [number handwritten, two­thirds of label red]/exigu­um. M. Pa. [handwritten, brown line around label and above ‘‘Pa’’]/ Agat. exiguum Mels. [handwritten]/ LECTOTYPE Agathidium exiguum Melsheimer , des. Miller and Wheeler, 2003 [red label with black line border]’’. Melsheimer did not indicate the number of specimens he had when he described the species, so we have selected the specimen in MCZC as the lectotype.

Agathidium ruficorne : lectotype (designat­ ed here to clarify association of this name with this species), ♀ in MCZC labeled ‘‘[circular light blue disc]/Type 3119 [number handwritten, two­thirds of label red]/ A. exiguum Mels. ruficorne Lec. [handwritten]/exiguum 2 [handwritten]’’. LeConte did not indicate the number of specimens he had when he described the species. There is one specimen in the MCZC with the light blue disc that LeConte used to indicate specimens from Lake Superior. We selected this specimen as the lectotype.

Agathidium californicum : lectotype (designated here to clarify association of this name with this species), Ƌ in MCZC labeled ‘‘Cal/Ƌ/ LectoTYPE 3022 [number handwritten, red label]/ A. californicum Horn. [handwritten]’’. Horn had several specimens when he described the species, but it is not clear how many or which ones they are. A single specimen in MCZC labeled as the type is selected as the lectotype.

Agathidium alutaceum : holotype, ♀ in MCZC labeled ‘‘Alask./ ♀ /TYPE alutaceum [name handwritten, red line under ‘‘TYPE’’]/ M.C.Z. Type 24027 [number handwritten, red label]/H.C. FALL COLLECTION/ Agathidium alutaceum Fall [handwritten, red line around border]’’.

TYPE LOCALITY: Agathidium exiguum : United States, Pennsylvania.

Agathidium ruficorne : ‘‘Lake Superior area’’.

Agathidium californicum : United States, California [here restricted].

Agathidium alutaceum : United States, Alaska.

DIAGNOSIS: This species is distinguishable from most species by the large, well­developed eyes, the prominent sutural stria extending nearly two­thirds the length of the elytron (in most specimens), the moderately broad metasternum beset with setae and rel­ atively large metasternal fovea, the small metafemoral tooth (fig. 171), and the characteristic male genitalia (figs. 351–353). The species is extremely similar to A. fawcettae and the two co­occur throughout a large portion of eastern North America (figs. 379, 380). Unfortunately, the only characters found for separating the two species are in the median lobe. That of A. exiguum has the apical portion in lateral aspect slender, curved, and apically abruptly expanded with a rather prominent subapical expansion or tooth on the dorsal margin (fig. 352), whereas in A. fawcettae the apical portion is broader, apically straight, and without the prominent expansion apically (fig. 355).

DESCRIPTION: Body moderately large (TBL = 2.21–2.80 mm), broad, robust (PNW/TBL = 0.46–0.53), rounded, strongly contractile.

Head and pronotum dark red; elytra red to dark red, not iridescent; venter red to redbrown; antennae and palpi red­yellow; legs yellow to yellow­red.

Head broad (MDL/OHW = 0.57–0.65), dorsal surface flattened, dorsoventrally compressed; with very fine punctures, each with a short, very fine seta, surface between punctures shiny, microreticulate on many specimens, consisting of fine, isodiametric cells; frontoclypeal suture obsolete medially; eyes prominent, large, protruding, not reduced; gula concave; antennomere ratios: length I: II:III = 2.2:1.0:2.0, width VII:VIII:IX = 1.0: 1.0:2.0. Pronotum very large, broad (PNL/ PNW = 0.67–0.79), strongly convex, anterolateral lobes strongly produced, lateral margin broadly curved, not angulate; with very fine, sparse punctures, each with a short, very fine seta, surface between punctures shiny, lightly microreticulate. Elytra broad, lateral margins strongly rounded, apically rounded (SEL/ELW = 0.99–1.04); punctation and surface similar to pronotum; sutural stria extending from apex to nearly two­thirds length of elytron. Flight wings well developed. Mesosternum broad, not declivitous; medial carina moderately developed. Metasternum moderately broad (MTL/MTW = 0.15– 0.19), medially flat, gently sloping dorsad anteriorly; oblique femoral carinae well developed, but not prominent where they meet medially on metasternum.

Male tarsi 5­5­4; pro­ and mesobasotar­ someres slightly laterally expanded, with moderately large field of ventral spatulate setae; mandibles not modified; metafemur moderately broad, with small, subapical tooth on posterior margin, apical margin irregularly sinuate (fig. 171); metasternal fovea large, transversely ovoid, with large brush of fine, dense, long seta. Median lobe in lateral aspect slender, bent basally, gently curved thereafter, apical portion flexed dorsally, slender, short, apex distinctly expanded on dorsal margin, expansion obtusely pointed (fig. 352); in ventral aspect slender, lateral margins parallel, apical portion evenly narrowed to rounded apex (fig. 351); operculum flat, short, robust, broad basally, gradually narrowed to broadly rounded apex (fig. 251); lateral lobes very slender throughout length, long, nearly straight, very slightly expanded apically, with 2 stout, subapical setae (fig. 253).

Female tarsi 5­4­4.

DISTRIBUTION: This species is very widespread throughout North America (fig. 379). Matthews (1887) reported this species (as A. californicum ) from Guatemala, but this record most likely refers to a different species.

SPECIMENS EXAMINED: ‘‘W.T.’’ [probably Washington Territory] (1, MCZC).

CANADA: Alberta: George lake, 50 km NW Edmonton, 11 Jun 1984, spruce­aspen forest, FIT, S and J Peck (1, CNCI); Tp40Rg10 W 3 mer9, 20 May 1962, BF and JL Carr (1, CARR). British Columbia: Salmo, 9 Jun 1968, Campbell, Smetana (1, QDWC); Salmon Arm, 22 Sep 1930, H Leech (1, CASC); Princeton, S Wash Creek, 22 Jul 1983, Lindgren funnel trap (1, MTEC); Lac la Hache, 12 Jul 1969, under bark, BF and JL Carr (5, CARR); Salmon Arm, 30 Sep 1922 (1, MCZC). Manitoba: Devils Lake, 100 km S Grand Rapids, 7 Jun 1984, pine­aspen forest, FIT, S and J Peck (1, PECK); Grass River Prov. Park 100 rd km SE FlinFlon, 7 Jun 1984, pine­aspen forest, FIT, S and J Peck (6, CNCI); Rennie, Lily Point, Whiteshell Prov. Park, 6 Jun 1984, maple­poplar forest, FIT, S and J Peck (2, PECK); Grass River Prov. Park 100 rd km SE FlinFlon, 7 Jun 1984, pine­aspen forest, FIT, S and J Peck (2, PECK). Ontario: Hamilton, 28 Jun 1982, M Sanborne (4, CNCI); 25 km W Ignace, 75 km E Dryden, 5 Jun 1984, fir­maple forest, FIT, S and J Peck (2, CNCI); Kenora District 17.3 mi S Sioux Narrows, 20 Jun 1975, L and N Herman (2, AMNH); Algonquin Prov. Park nr Brent, Nipissing Co., 19 Aug 1980, R Baranowski (3, LUND); Lake Su­ perior Prov. Park, Algoma Co., 9 Sep 1980, R Baranowski (7, LUND); Alfred, Alfred Bog, 10 Jun 1984, M Sanborne (3, PECK); Manitoulin I. 2 mi S Maple Pt, 1 Jun 1982, Malaise, A Ritchie (2, CNCI); 25 km W Ignace 75 km E Dryden, 5 Jun 1984, fir­maple forest, FIT, S and J Peck (5, PECK); Mattawa Champlain Prov. Park, 2 Jun 1984, mixed whitepine forest, evening car netting, S and J Peck (1, PECK); Pr. Ed. Co., 5 Jun 1954, decaying maple, JF Brimley (2, CNCI). Saskatchewan: Jay Jay Lake, Rt 102 130 km NE Candle Lake, 8 Jun 1984, pine­fir forest, FIT, S and J Peck (1, PECK).

UNITED STATES: Alabama: Opelika , 24 Mar 1974, EJ Kiteley (2, CNCI) ; Jefferson Co.: Rocky Ridge nr Little Shades Creek , 30 Dec 1978, litter, T King (1, CNCI) ; Shelby Co.: 21 Sep 1981, light trap, T King (1, CNCI). Arkansas: Columbia Co. : 2 mi NE Magnolia, 1 Apr 1993, hardwood, C Carlton (1, LSAM) ; Conway Co.: Pet Jean Mtn NW Slope Hwy 155, 16 Apr 1988, C Carlton (1, LSAM) ; Faulkner Co.: 10 mi E Conway at Field Trail Area , 20 Mar 1991, bottomland, Berlese, C Carlton (3, LSAM) ; Jefferson Co.: 1.3 mi S Interstate Hwys 88 and 79, 11 Mar 1977, bottomland, Berlese, H Chenowith (1, LSAM) ; Montgomery Co.: Little Mo. Falls Rec. Area , Slopes SW River, 15 Nov 1991, deciduous forest, C Carlton (3, LSAM) ; Polk Co.: Caney Creek Wildlife Area , 3.5 mi N Bard Springs, 5 Jul 1991, maple, beech forest, Berlese, C Carlton (3, LSAM) ; Sharp Co.: Cherokee Village , 26 Jun 1972, river bank litter, W Suter (1, AMNH). California: state only (5, MCZC) ; Lake Tahoe , 17 Jul 1917 (1, MCZC) ; Yosemite (1, EMEC) ; Davis Meadow, R. R. Flat , 8 Aug, FE Blaisdell (13, CASC) ; Alameda Co.: Berkeley , 27 May 1950 (1, EMEC) ; Alpine Co.: 14 Aug 1909, FE Blaisdell (2, CASC) ; Butte Co.: Feather Falls , 16 May 1971, DS Chandler (4, CASC) ; Calaveras Co.: Mokel, Hill , 14 Aug 1909, FE Blaisdell (1, CASC) ; Big Trees, Aug (1, CASC) ; Lassen Co.: Facht , 5 Jun 1922, JO Martin (21, CASC) ; Sierra Co.: Snag Lake , 20 Jul 1983, 6700̍, at lake margin, A Hardy, F Andrews (1, FGAC) ; Siskiyou Co.: Sisona, Jul (1, CASC) ; Tulare Co.: Sequoia Natl For., Quaking Aspen , 28 May 1979, on shelf fungus, T Eichlin (1, FGAC) ; Tuolumne Co.: 1 mi SW Pine Grove , 13 Apr 1975, under bark of Pinus ponderosa, FG Andrews (2, FGAC) ; Yuba Co.: Sierra Foothill Field Sta. 5 mi N Smartville, 4 May 1980, 1300–1500̍, JK Liebherr (3, EMEC) ; 1 mi W Strawberry Ranger Sta., 6 Jun 1980, 3600̍, JK Liebherr (2, EMEC). Colorado: Hinsdale Co.: Indian Head, 18 mi NW Pagosa Springs, 16 Aug 1977, under bark, dead Pinus ponderosa, FG Andrews (8, FGAC). Connecticut: Cornwall, 11 Jun 1970, Chamberlain (3, CNCI). District of Colum­ bia: Roosevelt Island, 25 Jul 1987 (1, QDWC). Georgia: Macon Co. : Ocmulgee N. Mon., 8 Jun 1981, pine­mixed forest, FIT, S Peck (4, CNCI). Idaho: Bannock Co. : Scout Mtn, 19 Jun 1975, AD Allen (1, PECK). Illinois: Palos Park, 26 May 1946, HS Dubas (1, FMNH) ; Mahomet, Nettie Hart Memoria Woods , 18 Sep 1984, MW Sanderson (7, CNCI) ; Champaign Co.: Mahomet, Hart Woods , 20 May 1979, oak woods, malaise FIT, S and J Peck (1, PECK) ; DuPage Co.: Argonne Natl Lab. , 24 Jul 1967, oak litter, W Suter (1, PECK) ; Argonne Natl Lab. , 24 Jul 1967, oak log, W Suter (1, FMNH) ; Washington Co. : 2 mi E Beaucoup, 9 Jun 1969, RL Westcott (1, RLWE). Indiana: Lafayette, 6 May 1964, EJ Kiteley (19, CNCI). Kansas: Douglas Co.: Breidenthal Res. 2 mi N Baldwin, 16 May 1984, window trap, J Pakaluk (2, QDWC) ; Breidenthal Res., 2 mi N Baldwin, 16 May 1984, window trap, J Pakaluk (4, AMNH). Kentucky: Edmonson Co.: Mammoth Cave NP, 15 May 1983, mesic forest, FIT, S and J Peck (1, PECK). Louisiana: Stuart Natl For. 3 km SW Pollock, 13 May 1985, FIT, H and A Howden, C. Scholtz (1, CNCI) ; Grant Co.: 18 km N Alexandria Stuart Lake Camp, 19 May 1983, forest, FIT, S and J Peck (1, PECK). Maryland: Takoma Park , 30 May 1943 (1, CASC). Massachusetts: Tyngsboro (1, CMNH) ; Tyngsboro , May 1902, EC Van Dyke (1, CASC) ; Low (1, CMNH) ; Middlesex Co.: Medford, 11 May 1971, under bark, A Newton (1, CNCI). Michigan: Kalamazoo Co. : Hickory Corners, Gull lake , 11 Jun 1981, FIT, R Anderson (3, CNCI). Minnesota: Beaver Bay , 12 Aug 1952, EJ Kiteley (5, CNCI). Mississippi: Claiborne Co. : 19 km NEP+ Gibson Owens Creek , mi 152, 18 May 1983, forest, FIT, S and J Peck (2, PECK) ; 19 km NEP+, Gibson Owens Creek , mi 52, 18 May 1983, forest, FIT, S and J Peck (1, PECK) ; Pontotoc Co.: 32 km SW Tupelo Tockshish, 17 May 1983, oak forest, FIT, S and J Peck (3, PECK). Montana: Redcliff Camp, 17 Jul 1968, BF and JL Carr (1, CARR). Nevada: state only (1, MCZC). New Hampshire: Straf. Co. : 1 mi SW Durham, 2 Jul 1987, FIT, DS Chandler (14, CNCI) ; Spruce Hole, 3 mi SW Durham, 12 May 1987, FIT, DS Chandler (17, CNCI). New Jersey: Medford , 26 May 1929 (2, CASC) ; Burlington Co.: Folly Camp nr Gretna , 12 May 1981, M Kaulbars (3, CNCI). New York: Bear Mtn, 1 Sep 1946, JG Rosen (1, EMEC) ; Tompkins Co.: Ringwood, Dryden , 13 Jul 1955, CA Triplehorn (1, CASC). North Carolina: Montgomery Co. : Uwharie, 5 Oct 1985, R Baranowski (1, LUND) ; Surry Co.: Pilot Mt. St Park, 6 Oct 1985, R Baranowski (3, LUND). Ohio: Delaware Co.: 15 Aug, DJ and JD Knull (1, CASC) ; Hocking Co.: 18 Oct, DJ Knull (1, CASC) ; Logan Co.: 3 mi NW Mingo , 4 Aug 1972, QD Wheeler (1, QDWC) ; 3 mi NW Mingo , 4 Aug 1976, QD Wheeler (1, QDWC). Oklahoma: Latimer Co.: Oct 1983, K Stephan (19, QDWC) ; 2 mi E Gown , 2 Jul 1987, wood rat nest, K Stephan and D Chandler (5, CNCI) ; 25 Feb 1985, litter, grass, FIT, K Stephan (1, KSIC) ; Gaines Creek , 3 mi SW Damon, 4 Jul 1987, forest litter, K Stephan and D Chandler (6, CNCI) ; 3 mi S Wilberion , 2 Jul 1987, forest litter, K Stephan and D Chandler (2, CNCI) ; 5 mi W Red Oak , Dec 1980, K Stephan (5, QDWC) ; Marshall Co.: Univ. Oklahoma Biol. Sta. on Lake Texoma ( Willis ), 14 Apr 1968, cottonwood log litter, W Suter (1, PECK) ; McCurtain Co.: Beaver Bend St. Park, 31 Jul 1968, log litter, W Suter (2, PECK). Pennsylvania: Easton , 9 Oct 1915, JW Green (1, CASC) ; Jeannette, 20 Aug, HG Klages (2, CMNH). South Carolina: Columbia , 23 Mar 1946, CL Cartwright (2, JRAC) ; Oconee Co.: 12 mi NW Walhalla, Oconee St. Park, 3 Jun 1981, 1700̍, FIT, S Peck (1, PECK). Tennessee: Sevier Co.: Greebrier Cove, Ramsey Cascade Trail, 19 May 1972, 3900̍, under bark of dead Aesculus, A Newton (2, FMNH). Texas: Grayson Co. : Juniper Point, 27 Jun 1969, log litter, W Suter (1, CNCI). Virginia: Mecklin Co. : 7 mi NE Chase City, 10 Aug 1975, Chandler (1, CNCI). Wisconsin: Kenosha Co. : Somers (3 mi W) County Line Forest , 19 Oct 1968, oak log, W Suter (1, PECK) .

DISCUSSION: Our examination of the types of A. exiguum , A. ruficorne , A. californicum , and A. alutaceum have led us to conclude that these names refer to the same species. Agathidium alutaceum is somewhat out of the range of more recently collected specimens of this species and it is a female, suggesting the possibility that it is a different species. However, the specimen agrees in all external characters with other western specimens of A. exiguum (including dorsal microreticulation).

This species has been collected during every month. It has been found in many forest habitats, especially from leaf and log litter. There is a record from a ‘‘wood rat nest’’. Elevation records are from 1300 to 6700 ft. A single host record is ‘‘shelf fungus’’.

Figures

Figs. 145–172. Agathidium oniscoides­group species, left male metafemur, ventral aspect: 145, A. oculeum. 146, A. recurvatum. 147, A. impensum. 148, A. cheneyi. 149, A. tenangoense. 150, A. rumsfeldi. 151, A. hirsutum. 152, A. cortezi. 153, A. tumidiventre. 154, A. aztec. 155, A. iridescens. 156, A. dentigerum. 157, A. stephani. 158, A. akrogeneios. 159, A. appalachium. 160, A. pocahontasae. 161, A. carolinense. 162, A. gallititillo. 163, A. divaricatum. 164, A. bushi. 165, A. georgiaense. 166, A. chauliodoum. 167, A. microphthalmum. 168, A. nimbosilva. 169, A. oniscoides. 170, A. rubellum. 171, A.

Figs. 329–356. Agathidium oniscoides­group species, aedeagus: 329–313, A. bushi: 329, ventral; 330, median lobe, lateral; 331, left lateral lobe, lateral. 332–334, A. georgiaense: 332, ventral; 333, median lobe, lateral; 334, left lateral lobe, lateral. 335–337, A. chauliodoum: 335, ventral; 336, median lobe, lateral; 337, left lateral lobe, lateral. 338–340, A. microphthalmum: 338, ventral; 339, median lobe, lateral; 340, left lateral lobe, lateral. 341–343, A. nimbosilva: 341, ventral; 342, median lobe, lateral; 343, left lateral lobe, lateral. 344–347, A. oniscoides: 344, ventral; 345, apex of median lobe, ventral, specimen from Macon City, NC; 346, median lobe, lateral; 347, left lateral lobe, lateral. 348–350, A. rubellum: 348, ventral; 349, median lobe, lateral; 350, left lateral lobe, lateral. 351–353, A. exiguum: 351, ventral; 352, median lobe, lateral; 353, left lateral lobe, lateral. 354–356, A. fawcettae: 354, ventral; 355, median lobe, lateral; 356, left lateral lobe, lateral.

Fig. 379. Geographic distribution of Agathidium exiguum (O = state record only).